IMAGE FORMATION APPARATUS

To reduce driving force that a drive mechanism should generate in order to oscillate an oscillation roll provided with a flywheel in comparison to a case where a direction of the driving force applied to an application object part by the drive mechanism is the same as a direction in which the application object part moves due to gravity acting on the flywheel.SOLUTION: An image formation apparatus comprises: a formation object body 52 which is conveyed; an image formation body which forms an image on the formation object body; a change roll 45 which is in contact with the inner peripheral surface of the formation object body in a manner of being rotatable around a rotational shaft and can change an angle with respect to a width direction of the formation object body of the rotational shaft; a flywheel which is provided in the change roll; and a drive mechanism 70 which applies driving force for changing the angle with respect to the width direction of the rotational shaft to an application object part 65 that moves together with the change roll. A direction of the driving force applied to the application object part by the drive mechanism is the reverse of a direction in which the application object part moves due to gravity acting on the flywheel.SELECTED DRAWING: Figure 8 【課題】駆動機構が被付与部に付与する駆動力の方向が、フライホイールに作用する重力に起因して被付与部が移動する方向と同じ場合と比べて、フライホイールが設けられた揺動ロールを揺動させるために駆動機構が発生しなければならない駆動力を小さくする。【解決手段】搬送される被形成体５２と、被形成体に画像を形成する画像形成体と、被形成体の内周面に回転軸まわりに回転可能に接触し且つ回転軸の被形成体の幅方向に対する角度を変更可能な変更ロール４５と、変更ロールに設けられたフライホイールと、変更ロールと一緒に移動する被付与部６５に、回転軸の幅方向に対する角度を変更するための駆動力を付与する駆動機構７０と、を備え、駆動機構が被付与部に付与する駆動力の方向が、フライホイールに作用する重力に起因して被付与部が移動する方向とは逆向きとなる。【選択図】図８